Works pefectly but when I don't charge it for 10-20 minutes more after it hits 100%, the battery drains really quick at a rate of 6% every THREE minutes. Ideas, anyone?

I keep all connections off and brightness at 50%. I close all background tasks and yet whenever I recharge my phone and not let it reach to 100%, the battery drains rapidly, even on stand-by. It only lasts me a complete day with moderate use IF I let it charge for an extra 10-20 minutes after hitting 100%. Thanks to anyone who could help me out. :)

I think the LG l7 II p710, if it will be upgraded to KitKat because it violates not even a release year, and because the LG L40 Dual which was recently announced whether take KitKat, considering that the LG L40 Dual has 512MB RAM against 768 MB RAM of the LG L7 P710 , and the LG L40 has a Dual-core 1.2 GHz Cortex-A7 against a Dual-core 1 GHz Cortex-A5 LG L7 P710 is not a big difference. It's my opinion.